Analysis of in-bore magnetic field in C-shaped armature railguns

摘要：

　　In order to analysis the distribution characteristics of in-bore magnetic field for C-shaped armature electromagnetic railgun, a computational model considering dynamic contact pressure is established.By solving the dynamic equation, the in-bore motion characteristics of the armature are obtained.The distribution of current in the rail and armature is analyzed based on the magnetic diffusion equation and Amperes law.On this basis, three simulation models are proposed, which correspond to static state, motion state and motion state considering the velocity skin effect.The magnetic field of the investigated points along the central axes of the armature front end are obtained.The results show that, in static state, the peak magnetic flux density of each investigated point is greater than the other two states.Velocity skin effect leads to a decrease in peak magnetic flux density.The change of motion state has little influence on the peak magnetic flux density of the investigated point that far away from the armature.The calculated results can be used in the electromagnetic shielding design of intelligent ammunition.

关键词： Railgun C-shaped armature Magnetic flux density

作者: Qiang YIN He ZHANG Hao-jie LI Yu-xin YANG

作者单位: Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 144-145

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）